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首页> 外文期刊>Materials & design >Effect of a post-weld heat treatment on the mechanical and microstructure properties of AA6061 joints welded by the gas metal arc welding cold metal transfer method
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Effect of a post-weld heat treatment on the mechanical and microstructure properties of AA6061 joints welded by the gas metal arc welding cold metal transfer method

机译：焊后热处理对气弧焊冷金属转移法焊接AA6061接头力学和组织性能的影响

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摘要

This work studies the effect of a post-weld heat treatment (PWHT) on the mechanical and microstructure properties of an AA6061 sample welded using the gas metal arc welding (GMAW) cold metal transfer (CMT) method. The CMT method was used because the method provides spatter-free welding, outstanding gap bridging properties, low heat input and a high degree of process flexibility. The welded samples were divided into as-welded and PWHT samples. The PWHTs used on the samples were solution heat treatment, water quenching and artificial aging. Both welded samples were cut according to the ASTM E8M-04 standard to obtain the tensile strength and the elongation of the joints. The failure pattern of the tensile tested specimens was analysed using scanning electron microscopy (SEM). A Vickers microhardness testing machine was used to measure the hardness across the joints. From the results, the PWHTs were able to enhance the mechanical properties and microstructure characteristics of the AA6061 joints welded by the GMAW CMT method.
机译：这项工作研究了焊后热处理（PWHT）对使用气体保护金属电弧焊（GMAW）冷金属转移（CMT）方法焊接的AA6061样品的机械和微观结构性能的影响。之所以使用CMT方法，是因为该方法提供无飞溅焊接，出色的间隙桥接特性，低热量输入和高度的工艺灵活性。焊接样品分为焊接样品和PWHT样品。用于样品的PWHT是固溶热处理，水淬和人工时效。根据ASTM E8M-04标准切割两个焊接样品，以获得接头的拉伸强度和伸长率。使用扫描电子显微镜（SEM）分析拉伸测试样品的破坏模式。使用维氏显微硬度测试机测量整个接头的硬度。从结果可以看出，PWHT能够增强通过GMAW CMT方法焊接的AA6061接头的机械性能和微观结构特征。

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  • 来源
    《Materials & design》 |2011年第10期|p.5120-5126|共7页
  • 作者

    R. Ahmad; M.A. Bakar;

  • 作者单位

    Department of Manufacturing and Industrial Engineering, Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, 86400 Parit Raja, Batu Pahat, Johor, Malaysia;

    Department of Manufacturing and Industrial Engineering, Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, 86400 Parit Raja, Batu Pahat, Johor, Malaysia;

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